Integrated circuit with circuit elements having different supply voltages
AssigneeDialog Semiconductor GmbH
InventorPaul Zehnich
Life of this patent
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Abstract
An integrated circuit includes first circuit elements with a supply voltage which is equal to the external supply voltage of the IC, and second circuit elements with a supply voltage which is smaller than the external supply voltage and is derived as an internal supply voltage from the first supply voltage. An active voltage divider supplies the internal supply voltage and includes a first resistance voltage divider connected between the supply voltage terminal and the reference potential, an impedance transformer connected after the first resistance voltage divider, and a circuit for controlling the scaled voltage at the tap of the first resistance voltage divider as a function of the load of the second circuit elements.
Claims3
An integrated circuit (IC) with first circuit elements, whose supply voltage is equal to an external supply voltage of the IC, and with second circuit elements whose supply voltage is smaller than the external supply voltage and derived as an internal supply voltage from the external supply voltage, said integrated circuit comprising an active voltage divider which supplies the internal supply voltage and includes
- a first resistance voltage divider connected between an external supply voltage terminal and a reference potential and having at a center tab supplying a scaled voltage,
- an impedance transformer connected to a first center tap of the first resistance voltage divider, and
- a circuit for regulating the scaled voltage at the first center tap of the first resistance voltage divider as a function of power consumed by the second circuit elements.
Dependencies are inferred from the claim text.